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DocuSign Envelope ID: B94F2D40-3B3C-47A7-86C2-6F1 B4F92C62C <br /> Orange County Emergency Services Building Construction Documents <br /> C. Construction: <br /> 1. Open drip-proof type except where specifically noted otherwise. <br /> 2. Design for continuous operation in 104 degrees F environment. <br /> 3. Design for temperature rise in accordance with NEMA MG 1 limits for insulation class, service <br /> factor, and motor enclosure type. <br /> D. Explosion-Proof Motors: UL approved and labelled for hazard classification, with over temperature <br /> protection. <br /> E. Motors driven by variable frequency drives (VFDs) shall be inverter duty and have a shaft <br /> grounding ring. <br /> F. Visible Nameplate: Indicating motor horsepower, voltage, phase, cycles, RPM, full load amps, <br /> locked rotor amps, frame size, manufacturer's name and model number, service factor, power <br /> factor, efficiency. <br /> G. Wiring Terminations: <br /> 1. Provide terminal lugs to match branch circuit conductor quantities, sizes, and materials <br /> indicated. Enclose terminal lugs in terminal box sized to NFPA 70, threaded for conduit. <br /> 2. For fractional horsepower motors where connection is made directly, provide threaded conduit <br /> connection in end frame. <br /> 2.03 APPLICATIONS <br /> A. Exception: Motors less than 250 watts, for intermittent service may be the equipment <br /> manufacturer's standard and need not conform to these specifications. <br /> B. Motors located in exterior locations, wet air streams downstream of sprayed coil dehumidifiers, <br /> draw through cooling towers, air cooled condensers, humidifiers, direct drive axial fans, roll filters, <br /> explosion proof environments, and dust collection systems: Totally enclosed type. <br /> C. Motors located in outdoors, in wet air streams downstream of sprayed coil dehumidifiers, in draw <br /> through cooling towers, and in humidifiers: Totally enclosed weatherproof epoxy-treated type. <br /> D. Motors located outdoors and in draw through cooling towers: Totally enclosed weatherproof <br /> epoxy-sealed type. <br /> 2.04 SINGLE PHASE POWER-SPLIT PHASE MOTORS <br /> A. Starting Torque: Less than 150 percent of full load torque. <br /> B. Starting Current: Up to seven times full load current. <br /> C. Breakdown Torque: Approximately 200 percent of full load torque. <br /> 2.05 THREE PHASE POWER-SQUIRREL CAGE MOTORS <br /> A. Starting Torque: Between 1 and 1-1/2 times full load torque. <br /> B. Starting Current: Six times full load current. <br /> C. Power Output, Locked Rotor Torque, Breakdown or Pull Out Torque: NEMA Design B <br /> characteristics. <br /> D. Insulation System: NEMA Class B or better. <br /> E. Testing Procedure: In accordance with IEEE 112. Load test motors to determine free from <br /> electrical or mechanical defects in compliance with performance data. <br /> F. Motor Frames: NEMA Standard T-Frames of steel, aluminum, or cast iron with end brackets of <br /> cast iron or aluminum with steel inserts. <br /> G. Bearings: Grease lubricated anti-friction ball bearings with housings equipped with plugged <br /> provision for relubrication, rated for minimum ABMA STD 9, L-10 life of 20,000 hours. Calculate <br /> bearing load with NEMA minimum V-belt pulley with belt center line at end of NEMA standard shaft <br /> extension. Stamp bearing sizes on nameplate. <br /> H. Weatherproof Epoxy Sealed Motors: Epoxy seal windings using vacuum and pressure with rotor <br /> and starter surfaces protected with epoxy enamel; bearings double shielded with waterproof <br /> non-washing grease. <br /> PDC Project 18102 COMMON MOTOR 23 05 13- 2 <br /> 12/17/2018 REQUIREMENTS FOR HVAC <br /> EQUIPMENT <br />